Explanation

• A liquid is a state of matter that has a fixed volume but not a fixed shape.
• It takes the shape of its container and maintains its volume unless an external force is applied to change it.
• Solid: A solid has both a fixed shape and a fixed volume.
• Gas: A gas has neither a fixed shape nor a fixed volume. It expands to fill its container.

Explanation

• A solid is a state of matter that has a fixed shape and a fixed volume.
• Solids maintain their shape and volume unless an external force is applied to change them.
• Liquid: A liquid has a fixed volume but takes the shape of its container.
• Gas: A gas has neither a fixed shape nor a fixed volume. It expands to fill its container.

Explanation

• Volume is the amount of space a material object occupies.
• It is a measure of the amount of three-dimensional space occupied by a substance or object.
• It is typically measured in units such as cubic meters (m³), cubic centimeters (cm³), or liters (L).

Explanation

• Matter is anything that occupies space and has mass.
• It can take many forms, including solids, liquids, gases, and plasma.
• Matter is the physical substance that makes up all objects, living and non-living.

Explanation

• Mould is a type of fungus that is a decomposer.
• It breaks down dead organic matter.
• Such as plant material, into simpler compounds, releasing nutrients back into the environment.

Explanation

Decomposers play a crucial role in breaking down dead animals, plants, and organic matter, releasing nutrients back into the environment. This process is essential for:

• Recycling nutrients
• Improving soil fertility
• Supporting plant growth and development
• Maintaining ecosystem balance

Explanation

• Decomposers are organisms that break down dead and waste products of producers and consumers, releasing nutrients back into the environment.
• Examples of decomposers include bacteria, fungi, and detritivores like earthworms and insects.

Explanation

• If the number of frogs increases, it is likely that the number of snakes would decrease.
• This is because snakes are predators that feed on frogs, and an increase in frog population would lead to a decrease in snake population due to competition for resources and potential overgrazing.

Explanation

• Frogs are heterotrophic animals that obtain energy by consuming other organisms, such as insects, worms, and even smaller frogs.
• They do not produce their own food like plants (producers) do, and they do not break down dead organisms like decomposers (such as bacteria and fungi) do.
• Therefore, the best description for a frog is a consumer.

Explanation

The correct order of the levels in a food chain is:

• Producer (plants and algae that produce their own food through photosynthesis)
• Consumer (animals that eat producers or other consumers)
• Decomposer (organisms like bacteria and fungi that break down dead plants and animals)

Last updated 17-02-2026